((1)) Except as otherwise specifically provided in this chapter, any person who intentionally—
((2)) It shall not be unlawful under this section for—
((3)) It shall not be unlawful under this section to advertise for sale a device described in subsection (1) of this section if the advertisement is mailed, sent, or carried in interstate or foreign commerce solely to a domestic provider of wire or electronic communication service or to an agency of the United States, a State, or a political subdivision thereof which is duly authorized to use such device.